IF Frequency Response UWBIF Adjustment

This adjustment applies to the following models and options:

And with options:

The goal of this adjustment is to generate corrections for the IF band shape. Option MPB is necessary is because the YTF is a tunable bandpass filter with a nominal bandwidth of 30 MHz to 50 MHz. The bandwidth of the YTF will band limit the IF Frequency Response. Bands 0, 1, 2, 3, 4, 5, 6 are adjusted.

In this adjustment a –10.00 dBm signal is applied to the signal analyzer. A reference amplitude is taken at the IF Center Frequency. The Source Frequency is then changed to a series of offset frequencies within the span of the IF. At each offset frequency the input amplitude is maintained at –10.00 dBm, and the signal amplitude is measured by the signal analyzer. The offset amplitude is subtracted from the reference amplitude. The resulting envelope created by all the offset amplitudes is the uncorrected IF Frequency Response.

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Required Test Equipment

Test Equipment

Recommended Model Number

Network Analyzer1, 2

N5247B

Cable, BNC (m) to BNC (m)

8120-1840

Cable, 2.4 mm (f) to 2.4 mm (m)

8121-2065 (or equivalent)

Adapter, 2.4 mm (f) to 2.4 mm (f)

11900B (or equivalent)

Adapter, Type-N (m) to 2.4 mm (m)

  • For N9021B options ≤ 526

11903A

Adapter, 2.4 mm (m) to 3.5 mm (f)

  • For N9021B Option C35

11901C

  1. A calibration must be performed on the network analyzer prior to running the adjustment (see below).

  2. PNA preference setting recommendation: Unselect Power: Force RF Power Off at the end of the sweep

Network Analyzer Calibration Procedure

The network analyzer used in this adjustment must be calibrated prior to running the adjustment. The calibration will need to be repeated once every three days or if the connectors or cables have been disturbed. If it's been within the three day time frame and the connectors and cables have not been disturbed, then the network analyzer calibration is not necessary and you may proceed with the adjustment.

For a list of required equipment and calibration instructions to perform the network analyzer calibration, refer to Network Analyzer Freq Sweep Calibration.

Connection Setups

In the following setups, cables are designated as solid lines and direct connections are designated as dashed lines.